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  • Question

  • Match the following:

    List I (Diode Rectifier) List II (Efficiency is Rf/RL = 0.25)
    A. Half wave 1. 0.54
    B. Bridge Rectifier 2. 0.65
    C. Full wave using tapped centre transformer 3. 0.325


  • Options
  • A. A-1, B-2, C-3
  • B. A-2, B-1, C-3
  • C. A-3, B-2, C-1
  • D. A-3, B-1, C-2

  • Correct Answer
  • A-3, B-1, C-2 

    • More questions

    • 1. A waveguide connected to a circularly polarized antenna must be able to efficiently propagate both vertically and horizontally polarised waves.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Which of the following noise does not occur in transistors?

    • Options
    • A. Partition noise
    • B. Shot noise
    • C. Flicker noise
    • D. Resistance noise
      • Discuss
    • 3. Which of the following modes cannot exist in rectangular resonant cavity?

    • Options
    • A. TE110
    • B. TE011
    • C. TM110
    • D. TM111
      • Discuss
    • 4. In microstrip line has dielectric material most commonly used is

    • Options
    • A. silicon
    • B. rubber
    • C. plastic
    • D. bakelite
      • Discuss
    • 5. In a full bridge inverter fed by a battery of voltage V, the rms value of fundamental component of output voltage is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. The units of polarization of dielectric are

    • Options
    • A.
    • B.
    • C. Cm
    • D.
      • Discuss
    • 7. In terms of R, L, G and C the propagation constant ? of a transmission line is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. Calculate the directivity of an antenna for ?E = 30°, ?H = 60

    • Options
    • A. 46
    • B. 23
    • C. 50
    • D. 100
      • Discuss
    • 9. In a step down chopper using time ratio control, the input voltage is V and duty cycle is a. The load is purely resistive having resistance R. The average and rms load currents are

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. In a single phase full wave ac regulator the rms value of load current is 20 A load is purely resistive. Then

    • Options
    • A. average thyristor current will be less than 20 A but rms thyristor current will be more than 20 A
    • B. both the average and rms thyristor currents will be less than 20 A
    • C. both the average and rms thyristor currents will be more than 20 A
    • D. rms thyristor current will be 20 A and average thyristor current will be 10 A
      • Discuss

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